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- 저자 : 김주완(Kim, Ju-Wan) (검색결과 235 건)
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김주완,이세원,박호종,Kim, Ju-Wan,Lee, Se-Won,Park, Ho-Chong 한국음향학회 2011 韓國音響學會誌 Vol.30 No.3
본 논문에서는 청각 기억 게임을 위하여 두 개의 소리 파형을 비교하여 파형의 리듬 유사도를 정량적으로 측정하는 기술을 제안한다. 제안한 방법은 두 입력 파형에 대하여 에너지 변화, 에너지 피크의 지속 시간, 음색 등을 분석하여 각 파형에 포함된 비트 위치를 검출하고, 두 파형의 템포 차이와 비트 수의 차이를 보상하는 과정을 통하여 두 파형의 리듬 벡터를 각각 정의한다. 다음, 두 리듬 벡터 사이의 차이와 비트 수의 차이를 적용하여 두 입력 파형의 리듬 유사도를 정량적으로 표현하는 식을 정의한다. 제안한 방법으로 측정한 리듬 유사도와 주관적 청취 평가로 측정한 리듬 유사도를 비교하였으며, 두 방법에 의한 리듬 유사도가 상관도 0.86을 가지는 것을 확인하였다. In this paper, a method for measuring rhythmic similarity between two sound signals for auditory memory game is proposed. The proposed method analyzes energy fluctuation, the temporal duration of energy peak, the timbre of two signals, and detects beat positions for each signal. Then, it determines the rhythm vector after compensating a difference in tempo and the number of beats between two signals. Finally, a method for rhythmic similarity measurement is defined as a function of the dissimilarity between two rhythm vectors and a difference in the number of beats. The rhythmic similarity measured by the proposed method and that by the subjective listening test are compared, and the correlation of 0.86 between two results is achieved.
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김주완,구영덕,배영철,Kim, Ju-Wan,Koo, Young-Duk,Bae, Young-Chul 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.5
본 논문에서는 MEMS에서 비선형적인 특성을 확인하기 위하여 Duffing 방정식을 가지는 MEMS 시스템을 제안하고 여기에 다른 종류의 비선형 항을 삽입하였을 때의 비선형 현상을 분석하였다. 검증 방법으로 파라미터 변화에 의한 카오스 운동이 있음을 시계열 데이터, 위상 공간, 전력 스펙트럼을 통하여 확인하였다. In this paper, we propose the MEMS system with Duffing equation to confirm nonlinear features in MEMS system. We also analyze nonlinear phenomena when adding the nonlinear term of another type. As a verification, we confirm chaotic motion by parameter variation through the time series, phase portrait and power spectrum.
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블룸필터를 사용한 화이트리스트 기반의 SIP 서버스 거부 공격 대응 기법
김주완,류제택,류기열,노병희,Kim, Ju-Wan,Ryu, Jea-Tek,Ryu, Ki-Yeol,Roh, Byeong-Hee 한국통신학회 2011 韓國通信學會論文誌 Vol.36 No.11B
SIP는 인터넷을 기반으로 하기에 기존 인터넷에서 발생하는 보안 위협에 노출되어 있어 서비스 거부 및 서비스 단절과 같은 문제를 야기하는 플러딩 공격에 영향을 받을 수 있다. 하지만 현재 제안된 서비스 거부 공격 대응 기법은 제안 기법의 복잡도와 다양한 서비스 거부 공격에 대응하지 못한다는 한계점이 있다. 그러므로 본 논문에서는 이러한 점을 고려하여 SIP 세션 설정 과정을 관찰하고 정상적인 세션을 맺은 사용자를 정상 사용자로 정의하여 이것을 이용한 화이트리스트를 구성함으로써 다양한 서비스 거부 공격 상황에서 정상 사용자에게 지속적인 서비스를 제공하고자 하는 방안을 제시한다. 본 방안은 다양한 공격 방법들을 네트워크 시뮬레이터인 OPNET을 이용하여 모델링하였고 서비스 거부 공격 시에도 지속적인 서비스 제공, 낮은 오탐율, 빠른 검색 시간을 달성코자 한다. SIP(Session Initiation Protocol) has some security vulnerability because it works on the Internet. Therefore, the proxy server can be affected by the flooding attack such as DoS and service interruption. However, traditional schemes to corresponding Denial of Service attacks have some limitation. These schemes have high complexity and cannot protect to the variety of Denial of Service attack. In this paper, we newly define the normal user who makes a normal session observed by verifier module. Our method provides continuous service to the normal users in the various situations of Denial of Service attack as constructing a whitelist using normal user information. Various types of attack/normal traffic are modeled by using OPNET simulator to verify our scheme. The simulation results show that our proposed scheme can prevent DoS attack and achieve a low false rate and fast searching time.
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김주완(Ju Wan Kim),박춘광(Chunguang Piao),김진오(Jin Oh Kim),김동현(Dong Hyun Kim),박두식(Doo-Sik Park) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
The paper deals with an ultrasonic transducer invented for simultaneously measuring flow velocity and pipe thickness. The transducer, whose structure is based on the conventional transducers for measuring flow velocity by obliquely transmitting ultrasonic waves to the flow direction, additionally generates ultrasonic waves transmitting vertically to a pipe for measuring pipe thickness. By measuring flow velocity with the invented transducer and a conventional oblique-incidence transducer and comparing their results, the accuracy of the flow velocity measurement of the invented one was evaluated. By measuring specimen thickness with the invented transducer and a conventional normal-incidence transducer and comparing their results, the accuracy of the thickness measurement of the invented one was evaluated.
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보도연맹원 학살과 지역사회의 지배구조 - 경남 마산지역의 사례와 인물을 중심으로 -
김주완(Kim Joo-Wan) 부산경남사학회 2005 역사와 경계 Vol.56 No.-
The most different point the US armys massacre of citizen or the Korean armys massacre of North Koreas guerrilla from the massacre event of KOOKMIN BODO YUNMEANG, is that this massacre was absolutely planned and intentionally conducted for unit members who unified and managed from government, massacre in most wide area regardless of combat or execution of tactic. Furthermore, it was shut down telling the truth by putting on the sacrifice after event.<br/> Government properly used the National security law, special law for punishment of particular prime, the implication law, anti-communism law, in order to hide the truth, and oppressed the survivors by putting them a left field ld suspicion, furthermore, they suppressed the survivors to watch out evelyly day and controlled the job and travel of them.<br/> The survivors were suppressed to think intentional lapse of memory according to the planned and structured control by government over 50years. And they oppressed the delusion of persecution they are communist.<br/> In result of that, the massacre event of BODO YUNMEANG is still slowly being solved by telling the truth or making the survivor union among various citizen massacre accidents.<br/> On the other hand, the assaulter who is directly and indirectly involved in massacre strengthen their social and politic power with the basement of suppressing anti-communism made by war and horror of massacre.<br/> This article, first, traced the life of Chul-young Choi, who was the charge of massacre in Gyeong-nam area and chief of Gyeong-nam police office and Young-ju Shin who was patrol manager of Gyeong-nam police office, Jong-won Kim who is the martial law commander.<br/> Chul-young Choi went up to high class of police through the basement of anti-communism activity after National Independence day, lived at his house in Ma-san till die.<br/> Young-ju Shin promoted many times and became a member of the National Assembly and faced hard time by anti-activity of the bereaved family unit at 7.29 general election right after 4.19 movement but became the member of the National Assembly again, such as enjoyed the power and honor at the same time after 5.16 rebellion.<br/> Jong-won Kim also punished 3 year in jail for the suspect of gun-shot at the citizen massacre at Shinwon-myon, Gochang-gun, but finally became free at March 1952 since it was only 8 month in a jail by Special release order of President Lee. And he became the head of police office at Chun-nam area and Security head in 1956, head of police officer school in 1958.<br/> And the police and special army in charge with massacre in Ma-san also never have responsibility for massacre event of Citizen Report union unit, excepting the punishment caused by their own sin. These special part police at the massacre, were promoted again at 3.15 movements 1960 after 10 years, and charged again with the massacre and tortures. <br/> The Anti-communists unit members worked as execution staff of BODO YUNMEANGt, were selected as a Municipal assembly man, Mayor and Member of the Assembly. And also establish their vested rights of province with obtaining various social power institutions.<br/> As of the representative, Mun-gi Son who was branch manager of civil unit at that time of massacre and BODO YUN MEANG, was elected as of Member of the Assembly in May 1952, Seok-Hyung Yoo who was chief of Korea Youth Unit, the same as half-Military organization, was elected as a Municipal assembly man in April 1952.<br/> Jong-shin Kim who was a enterprise department head of BODO YUN MEANG, Board member of Kuk-min-unit and advisor of Min-bo-dan, was elected as a Municipal assembly man and chief of Ma-san city in raw in April 1952. And he became a member of National Assembly and CEO of press and broadcasting company. Such as, he could execute not only his administrational and politic power but also the power of public press including economy area. He conducted the communism activity and nationalism
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폐쇄성 수면무호흡증 환자에서 하지불안증후군과 우울, 불안 및 불면과의 연관성
김주완(Ju-Wan Kim),김성완(Sung-Wan Kim),김재민(Jae-Min Kim),신일선(ll-Seon Shin),윤진상(Jin-Sang Yoon),배경렬(Kyung-Yeol Bae) 대한생물치료정신의학회 2016 생물치료정신의학 Vol.22 No.3
Objectives:An association between obstructive sleep apnea syndrome(OSAS) and restless legs syndrome(RLS) has long been reported. Both syndromes are associated with depression, anxiety, insomnia, and daytime sleepiness. However, these relationships have not been studied extensively, and many questions remain unanswered. This study investigated the prevalence of RLS and its association with depression, anxiety, insomnia, and daytime sleepiness in OSAS patients in Korea. Methods:The study enrolled 152 Korean OSAS in patients Chonnam National University Hospital. The International Restless Legs Syndrome Study Group criteria and International Restless Legs Scale were used to determine the diagnosis and severity of RLS. To assess depression, anxiety, insomnia, and day time sleepiness, all patients completed the Beck Depression Inventory(BDI), Beck Anxiety Inventory(BAI), Insomnia Severity Index(ISI), and Epworth Sleepiness Scale(ESS). Results:Overall, 65(42.6%) patients met least one of the RLS diagnostic criteria, and 17(11.1%) were diagnosed with RLS. The mean BDI, BAI, and ISI scores were higher in subjects with RLS symptoms compared with those without such symptoms. ESS scores were not significantly associated with RLS symptoms. There were significant positive correlations between RLS severity and BDI(r=0.246, p=0.049), BAI(r=0.247, p=0.031), and ISI(r=0.275, p=0.026) scores. Conclusion:There were significant relationships between RLS symptoms and depression, anxiety, and insomnia. We recommend that patients with OSAS be evaluated for symptoms of RLS.
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